Ankle brace



FIG. 1 is a perspective view of an ankle brace;

FIG. 2 is a left side view thereof;

FIG. 3 is a right view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines illustrate portions of the ankle brace which form no part of the claimed design. 

CLAIM The ornamental design for an ankle brace, as shown and described. 